Initial checkin of GCC 4.9.0 from trunk (r208799).

Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba

1 files changed, 225 insertions, 0 deletions

diff --git a/gcc-4.9/gcc/config/rs6000/aix.h b/gcc-4.9/gcc/config/rs6000/aix.h
new file mode 100644
index 000000000..5ab018486
--- /dev/null
+++ b/gcc-4.9/gcc/config/rs6000/aix.h
@@ -0,0 +1,225 @@
+/* Definitions of target machine for GNU compiler,
+   for IBM RS/6000 POWER running AIX.
+   Copyright (C) 2000-2014 Free Software Foundation, Inc.
+
+   This file is part of GCC.
+
+   GCC is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published
+   by the Free Software Foundation; either version 3, or (at your
+   option) any later version.
+
+   GCC is distributed in the hope that it will be useful, but WITHOUT
+   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+   License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with GCC; see the file COPYING3.  If not see
+   <http://www.gnu.org/licenses/>.  */
+
+/* Yes!  We are AIX!  */
+#define DEFAULT_ABI ABI_AIX
+#undef  TARGET_AIX
+#define TARGET_AIX 1
+
+/* Linux64.h wants to redefine TARGET_AIX based on -m64, but it can't be used
+   in the #if conditional in options-default.h, so provide another macro.  */
+#undef  TARGET_AIX_OS
+#define TARGET_AIX_OS 1
+
+/* AIX always has a TOC.  */
+#define TARGET_NO_TOC 0
+#define TARGET_TOC 1
+#define FIXED_R2 1
+
+/* AIX allows r13 to be used in 32-bit mode.  */
+#define FIXED_R13 0
+
+/* 32-bit and 64-bit AIX stack boundary is 128.  */
+#undef  STACK_BOUNDARY
+#define STACK_BOUNDARY 128
+
+#undef  TARGET_IEEEQUAD
+#define TARGET_IEEEQUAD 0
+
+/* The AIX linker will discard static constructors in object files before
+   collect has a chance to see them, so scan the object files directly.  */
+#define COLLECT_EXPORT_LIST
+
+/* On AIX, initialisers specified with -binitfini are called in breadth-first
+   order.
+   e.g. if a.out depends on lib1.so, the init function for a.out is called before
+   the init function for lib1.so.
+
+   To ensure global C++ constructors in linked libraries are run before global
+   C++ constructors from the current module, there is additional symbol scanning
+   logic in collect2.
+
+   The global initialiser/finaliser functions are named __GLOBAL_AIXI_{libname}
+   and __GLOBAL_AIXD_{libname} and are exported from each shared library.
+
+   collect2 will detect these symbols when they exist in shared libraries that
+   the current program is being linked against.  All such initiliser functions
+   will be called prior to the constructors of the current program, and
+   finaliser functions called after destructors.
+
+   Reference counting generated by collect2 will ensure that constructors are
+   only invoked once in the case of multiple dependencies on a library.
+
+   -binitfini is still used in parallel to this solution.
+   This handles the case where a library is loaded through dlopen(), and also
+   handles the option -blazy.
+*/
+#define COLLECT_SHARED_INIT_FUNC(STREAM, FUNC) \
+	  fprintf ((STREAM), "void %s() {\n\t%s();\n}\n", aix_shared_initname, (FUNC))
+#define COLLECT_SHARED_FINI_FUNC(STREAM, FUNC) \
+	  fprintf ((STREAM), "void %s() {\n\t%s();\n}\n", aix_shared_fininame, (FUNC))
+
+#if HAVE_AS_REF
+/* Issue assembly directives that create a reference to the given DWARF table
+   identifier label from the current function section.  This is defined to
+   ensure we drag frame frame tables associated with needed function bodies in
+   a link with garbage collection activated.  */
+#define ASM_OUTPUT_DWARF_TABLE_REF rs6000_aix_asm_output_dwarf_table_ref
+#endif
+
+/* This is the only version of nm that collect2 can work with.  */
+#define REAL_NM_FILE_NAME "/usr/ucb/nm"
+
+#define USER_LABEL_PREFIX  ""
+
+/* Don't turn -B into -L if the argument specifies a relative file name.  */
+#define RELATIVE_PREFIX_NOT_LINKDIR
+
+/* Because of the above, we must have gcc search itself to find libgcc.a.  */
+#define LINK_LIBGCC_SPECIAL_1
+
+/* Names to predefine in the preprocessor for this target machine.  */
+#define TARGET_OS_AIX_CPP_BUILTINS()		\
+  do						\
+    {						\
+      builtin_define ("_IBMR2");		\
+      builtin_define ("_POWER");		\
+      builtin_define ("__powerpc__");           \
+      builtin_define ("__PPC__");               \
+      builtin_define ("__unix__");              \
+      builtin_define ("_AIX");			\
+      builtin_define ("_AIX32");		\
+      builtin_define ("_AIX41");		\
+      builtin_define ("_LONG_LONG");		\
+      if (TARGET_LONG_DOUBLE_128)		\
+        builtin_define ("__LONGDOUBLE128");	\
+      builtin_assert ("system=unix");		\
+      builtin_assert ("system=aix");		\
+    }						\
+  while (0)
+
+/* Define appropriate architecture macros for preprocessor depending on
+   target switches.  */
+
+#define CPP_SPEC "%{posix: -D_POSIX_SOURCE}\
+   %{ansi: -D_ANSI_C_SOURCE}"
+
+#define CC1_SPEC "%(cc1_cpu)"
+
+#undef ASM_DEFAULT_SPEC
+#define ASM_DEFAULT_SPEC ""
+
+/* Tell the assembler to assume that all undefined names are external.
+
+   Don't do this until the fixed IBM assembler is more generally available.
+   When this becomes permanently defined, the ASM_OUTPUT_EXTERNAL,
+   ASM_OUTPUT_EXTERNAL_LIBCALL, and RS6000_OUTPUT_BASENAME macros will no
+   longer be needed.  Also, the extern declaration of mcount in 
+   rs6000_xcoff_file_start will no longer be needed.  */
+
+/* #define ASM_SPEC "-u %(asm_cpu)" */
+
+/* Default location of syscalls.exp under AIX */
+#define LINK_SYSCALLS_SPEC "-bI:%R/lib/syscalls.exp"
+
+/* Default location of libg.exp under AIX */
+#define LINK_LIBG_SPEC "-bexport:%R/usr/lib/libg.exp"
+
+/* Define the options for the binder: Start text at 512, align all segments
+   to 512 bytes, and warn if there is text relocation.
+
+   The -bhalt:4 option supposedly changes the level at which ld will abort,
+   but it also suppresses warnings about multiply defined symbols and is
+   used by the AIX cc command.  So we use it here.
+
+   -bnodelcsect undoes a poor choice of default relating to multiply-defined
+   csects.  See AIX documentation for more information about this.
+
+   -bM:SRE tells the linker that the output file is Shared REusable.  Note
+   that to actually build a shared library you will also need to specify an
+   export list with the -Wl,-bE option.  */
+
+#define LINK_SPEC "-T512 -H512 %{!r:-btextro} -bhalt:4 -bnodelcsect\
+%{static:-bnso %(link_syscalls) } \
+%{!shared:%{g*: %(link_libg) }} %{shared:-bM:SRE}"
+
+/* Profiled library versions are used by linking with special directories.  */
+#define LIB_SPEC "%{pg:-L%R/lib/profiled -L%R/usr/lib/profiled}\
+%{p:-L%R/lib/profiled -L%R/usr/lib/profiled} %{!shared:%{g*:-lg}} -lc"
+
+/* Static linking with shared libstdc++ requires libsupc++ as well.  */
+#define LIBSTDCXX_STATIC "supc++"
+
+/* This now supports a natural alignment mode.  */
+/* AIX word-aligns FP doubles but doubleword-aligns 64-bit ints.  */
+#define ADJUST_FIELD_ALIGN(FIELD, COMPUTED) \
+  ((TARGET_ALIGN_NATURAL == 0						\
+    && TYPE_MODE (strip_array_types (TREE_TYPE (FIELD))) == DFmode)	\
+   ? MIN ((COMPUTED), 32)						\
+   : (COMPUTED))
+
+/* AIX increases natural record alignment to doubleword if the first
+   field is an FP double while the FP fields remain word aligned.  */
+#define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED)			\
+  ((TREE_CODE (STRUCT) == RECORD_TYPE					\
+    || TREE_CODE (STRUCT) == UNION_TYPE					\
+    || TREE_CODE (STRUCT) == QUAL_UNION_TYPE)				\
+   && TARGET_ALIGN_NATURAL == 0						\
+   ? rs6000_special_round_type_align (STRUCT, COMPUTED, SPECIFIED)	\
+   : MAX ((COMPUTED), (SPECIFIED)))
+
+/* The AIX ABI isn't explicit on whether aggregates smaller than a
+   word/doubleword should be padded upward or downward.  One could
+   reasonably assume that they follow the normal rules for structure
+   layout treating the parameter area as any other block of memory,
+   then map the reg param area to registers, i.e., pad upward, which
+   is the way IBM Compilers for AIX behave.
+   Setting both of the following defines results in this behavior.  */
+#define AGGREGATE_PADDING_FIXED 1
+#define AGGREGATES_PAD_UPWARD_ALWAYS 1
+
+/* Specify padding for the last element of a block move between
+   registers and memory.  FIRST is nonzero if this is the only
+   element.  */
+#define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \
+  (!(FIRST) ? upward : FUNCTION_ARG_PADDING (MODE, TYPE))
+
+/* Indicate that jump tables go in the text section.  */
+
+#define JUMP_TABLES_IN_TEXT_SECTION 1
+
+/* Define any extra SPECS that the compiler needs to generate.  */
+#undef  SUBTARGET_EXTRA_SPECS
+#define SUBTARGET_EXTRA_SPECS						\
+  { "link_syscalls",            LINK_SYSCALLS_SPEC },			\
+  { "link_libg",                LINK_LIBG_SPEC }
+
+#define PROFILE_HOOK(LABEL)   output_profile_hook (LABEL)
+
+/* No version of AIX fully supports AltiVec or 64-bit instructions in
+   32-bit mode.  */
+#define OS_MISSING_POWERPC64 1
+#define OS_MISSING_ALTIVEC 1
+
+/* WINT_TYPE */
+#define WINT_TYPE "int"
+
+/* Static stack checking is supported by means of probes.  */
+#define STACK_CHECK_STATIC_BUILTIN 1